online status help

Hi, I checked my 485 status online today and found this information:

On November 22, 2004, we responded to your request for more information concerning your case. If you have not received our response within 30 days from this date, please call customer service at 1-800-375-5283.

I have not received the letter yet. But maybe it has been sent to my lawyer?
If you have any clue of what this letter is about,please give me a short reply. I am a little nervous. Thank very much for your help.